Pulse oximeter monitor
US4653498A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 20, 1986 |
| Grant date | Mar 31, 1987 |
| Priority date | — |
| Expiry date | May 20, 2006 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B2505/03
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A display monitor is disclosed for a pulse oximeter of the type wherein light of two different wavelengths is passed through body tissue, such as a finger, an ear or the scalp, so as to be modulated by the pulsatile component of arterial blood therein and thereby indicate oxygen saturation. A tonal signal is emitted having a pitch proportional to the ratio of oxygen saturation and a sequential repetition proportional to pulse. A visual cue consisting of an array of strobed light emitting diodes is flashed having a total light output proportional to the magnitude of the pulse and a sequential flashing rate proportional to pulse rate. A systematic rejection of extraneous or irregular detected data prevents undue sounding of alarms.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.